During the month of Ramadan, Muslims typically complete the recitation of the whole Quran during tarawih prayers.In order to extrapolate the meaning of a particular Quranic verse, most Muslims rely on exegesis, or tafsir. The latter two terms also denote units of revelation.(The Book), though it is also used in the Arabic language for other scriptures, such as the Torah and the Gospels.The term mus'haf ('written work') is often used to refer to particular Quranic manuscripts but is also used in the Quran to identify earlier revealed books.The manuscript according to Zayd remained with Abu Bakr until he died.Zayd's reaction to the task and the difficulties in collecting the Quranic material from parchments, palm-leaf stalks, thin stones and from men who knew it by heart is recorded in earlier narratives.
Thereafter, he received revelations over a period of 23 years.
After Abu Bakr, Hafsa bint Umar, Muhammad's widow, was entrusted with the manuscript.
In about 650, the third Caliph Uthman ibn Affan (d.
Sahih al-Bukhari narrates Muhammad describing the revelations as, "Sometimes it is (revealed) like the ringing of a bell" and Aisha reported, "I saw the Prophet being inspired Divinely on a very cold day and noticed the sweat dropping from his forehead (as the Inspiration was over)." The Islamic studies scholar Welch states in the Encyclopaedia of Islam that he believes the graphic descriptions of Muhammad's condition at these moments may be regarded as genuine, because he was severely disturbed after these revelations.
According to Welch, these seizures would have been seen by those around him as convincing evidence for the superhuman origin of Muhammad's inspirations.